The new Olympic venues in Sochi, Russia, will worsen flood risk because of both site selection and the failure on the part of construction firms to account for local geographic conditions, environmental engineers said.

The sites are located in Imeretinsky lowlands, a rain-sodden region on the Black Sea coast, Sourceable reported.

Environmental activists also warned that the dumping of construction waste in several landfill sites poses a huge risk to the quality of local water supply.